/*
Simple Image Trail script- By JavaScriptKit.com
Visit http://www.javascriptkit.com for this script and more
This notice must stay intact
*/

var offsetfrommouse = [15, 25]; //image x,y offsets from cursor position in pixels. Enter 0,0 for no offset
var displayduration = 0; //duration in seconds image should remain visible. 0 for always.

var defaultimageheight = 500; // maximum image size.
var defaultimagewidth = 500; // maximum image size.

var timer;

function gettrailobj() {
    if (document.getElementById)
        return document.getElementById("preview_div").style
}

function gettrailobjnostyle() {
    if (document.getElementById)
        return document.getElementById("preview_div")
}


function truebody() {
    return (!window.opera && document.compatMode && document.compatMode != "BackCompat") ? document.documentElement : document.body
}


function hidetrail() {
    gettrailobj().display = "none";
    document.onmousemove = ""
    gettrailobj().left = "-1000px"
    clearTimeout(timer);
}

function showtrail(imagename, title, width, height) {
    i = imagename
    t = title
    w = width
    h = height
    timer = setTimeout("show('" + i + "',t,w,h);", 200);
}
function show(imagename, title, width, height) {

    var docwidth = document.all ? truebody().scrollLeft + truebody().clientWidth : pageXOffset + window.innerWidth - offsetfrommouse[0]
    var docheight = document.all ? Math.min(truebody().scrollHeight, truebody().clientHeight) : Math.min(window.innerHeight)

    if ((navigator.userAgent.indexOf("Konqueror") == -1 || navigator.userAgent.indexOf("Firefox") != -1 || (navigator.userAgent.indexOf("Opera") == -1 && navigator.appVersion.indexOf("MSIE") != -1)) && (docwidth > 650 && docheight > 500)) {
        (width == 0) ? width = defaultimagewidth : '';
        (height == 0) ? height = defaultimageheight : '';
        var coef = 1;
        //width+=30;
        //height+=55;

        if (width > 500 || height > 500) {
            if (width > height)
                coef = 500 / width;
            else
                coef = 500 / height;
            width = width * coef;
            height = height * coef;
        }


        /*var width1= width + 30;
        var height1 = height + 55;*/
        var width1 = width + 30;
        var height1 = height + 95;

        defaultimageheight = height1;
        defaultimagewidth = width1;

        document.onmousemove = followmouse;


        newHTML = '<div class="border_preview"><h2 class="title_h2">' + ' ' + title + '</h2><div id="loader_container"><div id="loader"><div align="center">Loading image...</div><div id="loader_bg"><div id="progress"> </div></div></div></div>';
        /*newHTML = newHTML + '<h2 class="title_h2">' + ' '+title + '</h2>'*/

        newHTML = newHTML + '<div class="preview_temp_load"><img onload="javascript:remove_loading();" src="' + imagename + '" border="0"></div>';
        newHTML = newHTML + '</div>';

        if (navigator.userAgent.indexOf("MSIE") != -1 && navigator.userAgent.indexOf("Opera") == -1) {
            newHTML = newHTML + '<iframe src="about:blank" scrolling="no" frameborder="0" width="' + width + '" height="' + height + '"></iframe>';
        }

        gettrailobjnostyle().innerHTML = newHTML;
        gettrailobj().display = "block";
    }
}

function followmouse(e) {

    var xcoord = offsetfrommouse[0]
    var ycoord = offsetfrommouse[1]

    var docwidth = document.all ? truebody().scrollLeft + truebody().clientWidth : pageXOffset + window.innerWidth - 15
    var docheight = document.all ? Math.min(truebody().scrollHeight, truebody().clientHeight) : Math.min(window.innerHeight)

    if (typeof e != "undefined") {
        if (docwidth - e.pageX < defaultimagewidth + 2 * offsetfrommouse[0]) {
            xcoord = e.pageX - xcoord - defaultimagewidth; // Move to the left side of the cursor
        } else {
            xcoord += e.pageX;
        }
        if (docheight - e.pageY < defaultimageheight + 2 * offsetfrommouse[1]) {
            ycoord += e.pageY - Math.max(0, (2 * offsetfrommouse[1] + defaultimageheight + e.pageY - docheight - truebody().scrollTop));
        } else {
            ycoord += e.pageY;
        }

    } else if (typeof window.event != "undefined") {
        if (docwidth - event.clientX < defaultimagewidth + 2 * offsetfrommouse[0]) {
            xcoord = event.clientX + truebody().scrollLeft - xcoord - defaultimagewidth; // Move to the left side of the cursor
        } else {
            xcoord += truebody().scrollLeft + event.clientX
        }
        if (docheight - event.clientY < (defaultimageheight + 2 * offsetfrommouse[1])) {
            ycoord += event.clientY + truebody().scrollTop - Math.max(0, (2 * offsetfrommouse[1] + defaultimageheight + event.clientY - docheight));
        } else {
            ycoord += truebody().scrollTop + event.clientY;
        }
    }
    gettrailobj().left = xcoord + "px"
    gettrailobj().top = ycoord + "px"

}
